Calling device.



W. KAISLlNU.

CALLING DEVICE. APPLICATION FILED APR.2G,1911.

Patented'may 26, 1914.

2 SHEETS- SHEET 1f.

MV l Wiliam ffm-51mg W. KAISLING.

CALLING DBVIGE. APPLICATION FILED 11,511,262 1911.

Patented May 26, 1914,

2 SHEETS-SHEET 2.

v I l 1 uNiTED sTATiis PATENT orrioii.

WILLIAM KAISLING, OF CHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG- SWITCHBO'ARD & SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CALLING DEVICE,

lie it known that I, Viriiiimn liaismnc, a

citizen o'lihe United States of America, re-

- impulse transmitters as they are sometimes vention, Figure called. and particularly to that type in which a set of impulses comprising'several series ot impulses are to be transmitted, and lo such a device in which the number repre- -enling a set ol series ot' impulses in corresponding digit values, is lirst set up by a plurality ot' setiing members and in which the adjusted impulse mechanism is therea'liei re .used lor operation.

Bly invention is preferably adaptable for use iu eoninction with so-called two-wire oimetallic line telephone systems, in which the .metallic circuit is interrupted by the iinpulse springs of the calling device according lo its adjustment.

hn object' ot' my invention is to provide sui-h a calling device, as above outlined, which is. more simple ot' construction, cheaper to manufacture, more eiiicient in operation. and more compact.

lt is Well known that in two-wire or metallic line telephone s vsleins in which autoinatic switches are operated responsive to interruptions of the metallic circuit and ,speeially where slow-acting relays are et'- lected by `these operations, that it is a great advantage to have a calling device which, ai'ter being set up for adjustment and released i'or transmitting impulses, is incapable of being interfered with by the operator while the impulse springs are operating or until the ii'iccluiuism thereof has been restored to normal.

Another object ot' my invention is to provide such a device inwhich the impulse mechanism, after being adjusted and released by the operator for transmitting impulses, .may not be interfered with or readjusted until after the resulting impulse transmission `has been etliected.

Referring to th icconiplinying drawings for more tall `unl-erstailiding of my in- 'ce view of the calling device ien with its face plate removed bowing oie interior mecha- `iiism. Fi 2 is a longitudinal sectional view Specification of Letters Patent.

Application led April 26, 1911.

Patented May 26, 1914. Serial No. 623,420.A

alongtlie line 2+? of Fig. 1, looking in the direct-ion of the arrow in connection therewith. Fig. is a bottom view of the device of Fig. l, Fig. 4 is a cross section alonglline 4 4 of Fig. 1 viewed in the direction of the arrow in connection therewith and the showingolt' the parts at normal. Fig. 5 is a view similar to Fig. 4 but with some of the mechanism shown ott' normal as it appears during the operation ofthe device. Fig. G is an end view of the impulse cylinder showing particularly the impulse teeth and cooperating impulse arms. Fig. 7 is a longitudinal section along the line 7 7 of Fig. 1 viewed in the direction of the arrow indicated thereon. Fig. S illustrates part otl one of the/setting members partly shown in section. Fig. 9 is a sectional view along line 9 9 of Fig. 8 viewed in the direction of the arrow inencated thereon. Fig. 10 illustrates in perspective a pawl and disk arrangement for normally locking the device against actuation and for controlling the releasing and stopping of the mechanism. Fig. 11 is a `perspective view of the oH-normal locking pawl for locking the winding member against further forward movement lduring the operation of the impulse mechanism. F ig. 12 shows-the same ratchet as illustrated in Fig. 11, together with a cooperating check pawl, the parts illustrated in the three Figs. 10. 11 and 12 being shown in a normal position. Fig. 13 is a sectional View of the spring motor winding member. Fig. 14 illustrates a portion of the sliding locking bar 17 showing particularly the lon-4 gitudinal openings therein and locking rollers. Fig. 15 illustrates the preferred arrangement of impulse springs. Fig. 16 is a face view of the calling device showing the openings, which are disposed above the numerals on the indicators carried by the setting members. Fig. 17 is a diagrammatieally illustrated circuit arrangement of a Well known substation ltelel hone with the calling device of my inve tion connected therewith. l

Generally speaking the c/alling device of my invention comprises preferably a frame l, which supports the medhanism, a set ofA acts upon the impulse springs 2, a plurality of settingV members 4, 4', etc., a corresponding number of adjustable impulse arms 5, 5, etc., which fare adjustable by, their correspending setting" member, the seid img iulee arms being adapted to be @poured or Are-v oiprccuted by their correspondi gimpulse teeth a, l), e, etc.7 which are cev ed on the impulso cylinder 6. A. spring Winding lmob 87 is provided lwhich is adapted to be rotated after the setting members :ne zn'ljueted ter the purpose of Winding of the spring motor for lnliereting the impulse mechanism.

To operate the device when used in com nection with un mit matic tolephor', tem for dirertively sont. ollieg 'the i in u well known. manner7 assuming substution d1.21110 to be celled, the setting bers 4, et', etc..` ere adjusted so that the 1n dieetor numbers carried thereby correspond to the digits of the called numbcras illus trated in Fig'. 1,6. lheree'fter the knob 87 lis given one complete turn, thereby Winding up the power storing spring7 .und upon the complete rev-elution elI the seid knob 87 the impulse mech.: is automatically .roleljised for cpei tion, Wuereby the set of im "rises5 corresponding in nmnber to the dill .1 digit values cgt'the numbers set up on the device, ure trensmitted. For instance with the device set for number 11110, this mech` :mism is in position as illustrated in the drawings end upon the operator Winding the spring.; motor by Ineens of Winding member BO, the 'impulsemechenism'l is :internati-- cally' released und cet es Frst rn single opt-nnu tion of the impulse springs followed ,by three more single operations for the other three digits l, and finally ten operations of the impulse springs representing th units digit Referring now to the ceiling device more indetail, the mechanism thereof comprises e mein casing or frame 1 to which ie :in-- sulatingly secured the impulse springs 2. The said impulse 'springs ere ertueted by e common member 3 pivoted et points il', the said member 3 being free to be reciproceted on its. bearings. The pivoted member 3, which act-s as a common impulse spring ne tuntin member, is part-ly broken away et its rig t end in Fig. l to more clearly illus trate the mechanism beneath. A plurality of individual im ulse arms 5, 5', etc., are arranged preferab y to engage the portion 32 of member 3 as illust-rated in Fig. l. Each of the arms 5 is securely staked to its correspending reek 7, 7 etc., the seid recksrbeing longitudinally movable and rotatable upon theirI shafts 8 and 9. The racks 7, 72 und 7* are looscuppn the shaft 9, und the racks 7 `ond 7 a ereloose upon the shaft 8. The said shafts Send 9 are secured at their ends to the casing 1 in a suitable manner being securely held free from rotation. The racks with their impulse arms 5 are longitudinally adjusted on their shafts 8 end El preferably by means of an associated pinion 10,-which is part of thesetting member meml lech sett-ing member 4, et', etc.7 is a1'- id to be adjusted or rotated: by the opund comprises u shaft l1 rotatably mourned in suitable bearings inthe casing 1 and :t rigidly fastened plete 1Q. A t the 70 outer end of shaft 11 a lmurlcd. linob 13 is fastened preferably by Ineens of e pin, While :it the other end et shelf. il. the teeth of pin-- ure eut. .(1. lso c 'led by the shaft 'lll indicator con .ng ot :t cylinder 1.1i 75 l to seid snuit lll. preferably by of u pin 15 driven into shaft il und to lit into slot le out into the cyliuu op ings r ein iii the .sh-aft 1l4 ns illusw tr d in l 4. llztte 17 carrn n plurality et rollers i8. one for euch oi the stur 90 6, the seid rollers being held against theircorrespondir i er Wheels 1G, es illust-rnted in Fig. 2, due to the tension olf spring 19 which .'-icts upon the plete 17, tending to' hold the rollers against the teeth of the Wheels 16. The plate 1,7 With its rollers 18 "serves to prevent .rotating .eny of the setting members except to e definite position so as to secure e. positive adjustment of the setting memlxere und their associated impulse firms 5, es it will be seen that in moving e setting member unless it is moved to a- Vposition so that its roller is between the teeth as illustrated, the said roller presses against the side cit' atooth and rotates the setting mem- 105 ber until the roller rests' in u. position as illustrated in Fig. 2. The plate 17, lwith its rollers 18, also serves es :i lock to prevent roteting the setting members 4, While the impulse mechanism is operating as will be more fully explained.

To reciprocate the impulse arms 5 for the purpose of operating the impulse springs 2, a plurality of sets 2O of impulse 'teeth a, 1b, c, etc., ere provided, one -tor each of the irnpulse` arms, the seid iinpulsc teeth being suitably disposed' uponthe'surface of the cylinder G. Each set 20 of impulse teeth a, d, c, etc., comprises ten teeth.arrangedl as moet clearly illustrated in Figs. 3 nxfd 6, 120 there being five such sets, 2O to 204. The impulse 'teeth a, Zi, c, etc., are so constructed with relation to their corresponding arms 5 that when the cylinder 6 is rotated, the teeth a., b, etc., coperate with the endh 21 of the arms 5, thereby rocking the said arms 5 about their pivot and causing thtsaid :t1-ms 5 to reciprocate the pivoted mernl ber 3 end operatingimpulse springs.

Referring to the setting member 4 at th'e )IQ extreme left of Fig. 1, it willbe noted that its corresponding impulse arm 5 is adjusted to ay position in relation to its impulse teeth 20 so that when cylinder G is revolved'. onlv thertooth l! will engage arm 5, thereby operating pivoted member Si and impulse springs 2 but a single time. lt will be noted that the indicator of setting member -l has its numeral 1 in a position whereby it would show below its opening in face plate 22, as in Fig. 1G, thus indicating that but a single operation of impulse springs 2 will be effected responsive to its adjustment. iVhen arm 5 moved to its extreme right end position (Fig. 1) by setting member 'l. it `will be in a position directly above tooth 'i and theindicator 14 will have its numeral 0 showing beneath its corresponding opening in faceplate 22, and the rack 7 and its pinion 10 is so proportioned in relation to indi- 'cator 14 that when set-ting member 4 is adjusted its corresponding impulse arm 5 will assume a position in relation to its impulse teeth 20 so as to operate impulse springs 2 a number of times, corresponding to the numeral on indicator 14 showing through its opening in the face plate.

v Cylinder 6 when released for operation rotates in the direction of the arrow indicated thereon in Fig. 1, making one complete revolution only for each voperation of the calling device, and it will be noted that the sets of impulse teeth 20 are so disposed upon the cylinder 6 that set 20 operates arm 5 first, then set 20 operates arm 5, etc., until set 20* has operated when the cylinder is automatically stopped.

' With the device adjusted as illustrated in Fig. 1, the impulse Asprings 2 would be operated to transmipset of impulses, each series of the set -c rresponding respectively in digit values to the numbers 11110, that is.l the first four series of impulses of the set. would be a single operation of the impulse `springs, corresponding to the digit 1, while the last series of the set would consist of' ten impulses, corresponding to the digit 0.

It will be noted that racks 7, 72 and 7'L are above their pinions 10: as illustrated in Fig. 1, While the racks 7 and 73 are below their corresponding pinions, so that when setting members 4, 42 and 44 are rotated in a clockwise direction, their corresponding racks 7 and impulse arms 5 are moved from left to right, while when the setting members 4 and 43 are rotated in a clockwise direction, their corresponding racks 7 are moved from right to left..l but it will also be not-iced that the sets of impulse teeth 20 are disposed upon the cylinder 6 to take care of this, that is, the impulse sets 20, 202 and 204 are disposed upon the cylinder' 6 longitudinally opposite to that of the impulse teeth '20V and 203.

Cylinder 6 is rigidly secured to the shaft 23, the saidshaft'being 'suitably journaled at one end in the bearing 24, preferably :t nut 24, threaded into the casing 1. The other end of the shaft :'23 is jonrnaled inthe iatcliet wheel '25, said shaft 2li being free t0 rotate within its bearings.

To furnish power for operating the calli ing device a coiled spring 2G is provided,L

naled within the bearing 27, the said bearing 27 being rigidly secured to the casing 1 in a suitable manner. The .winding knob 87 is fastened to the en d of shaft-l 25 b v means of the slotted nut '28 which passes through the knob-87 and threads on to the end of shaft 25. A shoulder is cnt upon `the shaft 25 and disposed between this shoulder and knob 87 is a washer 29. the said washer being lclamped between Athe shoulder on'shaft 25 and the knob S7. 'lhe ratchet wheel 25 and shaft 25- are free to be rotated in sleeve 27 by knob 87. As previously stated, spring 2G is so coiled that its tendency is to pull cylinder (i in the direction of the arrow indicated thereon. and the pull upon the winding mechanism 30 is of course in an opposite direction. To normally lock said cylinder 6 against rotation by spring 2G, a normal locking pawl. 31 is provided, normally engaging a slot in disk 32, said disk being pinncdto the shaft of cylinder G. To .normally lock the winding member 30 against back rotation by spring 26,.:1 check pawl is provided normally engaging a locking tooth 34 upon ratchet wheel 2 The calling device is preferably arranged so that but a single revolution of winding member BOis required to cause an operation thereof, and to pa'event an operator from rotating the winding member 30 more than asingle revolution, for ea'ch operation of the impulse mechanism, anioft normal locking pawl 35 is provided, the said pawl being adapted to coperate with an off normal locking` tooth 3G upon ratchet wheel 25 to prevent any further forward movement of the winding member 30 until after the im.- pulse mechanism has operated.. The said.

Apawls S1, 35 and are pivotally mounted upon the inner surface of the casing 1 by means of a screw stud 37, said pawls being loose upon said stud 37 and independently free to rotate thereon. A pin 39 is carried. by pawl B53, projecting beneath an end of locking pawl 31, as illustrated in Fig. 10.

The check pnwl serves to prevent boel; rotation of windingv member 30 when it is moved forward duringr the Windii'ig opere-- tion of the spring` motor, by engaging the successive teeth of ratchet wheel 25 when the winding member 30 is rotated, the said paw] being held against the teeth of ratchet wheel by u Het tension,spring` l0. Nor.- n'uil lockingr pziivl 3l is held against the disk due to the tension of shunt springfll which nots upon pawl 31 to holdL it in such operative relation. Oil normal lockingpuwl 35 is provided with pin l2 which is driven into seid puwl 35 Aand projects beneath the Hut extension 31 of normal locking pziivl 31, ns illustrated by dotted lines in Fig. 10, the seid pin 42 engaging the lower surface of this extension 31. A flot tension spring'` 43 is provided to not upon oii' normal locking ptiwl 35, the. tendency of said spring t3 being to press the end 35', illustrated in Figli; i'lownword, thereby tendine,l to hold the taiiothed end oi? oiwl ont of engage ment with tooth tio and. pressing pin 4t2 against the lower surface of erm The shunt springs 41, fiel. und the tension springs 43 und L10 ure insulatingly mounted upon the inner surface of the casing l, suitable terminals being provided for the shunt springs 41,41', but there is no electrical connectionI established with the tension springs 43 and 40. The shunt springs 0l and 41 are adapted to hold their contact closed while the normal locking pawl 31 is riding upon the periphery of the disk shown in Fig. 5, which is during the time the. 'impulse mechanism is operating sind upon the return of disk 32 lto normal paw'l 3l 'again drops into the slot in disk 32, thereby allowingr the shunt springs 41, 41 to again open their Contact.

To wind the power spring- 2G end automaticully release the culling device for operation, the winding knob 87 is rotated by the operator in the direction of the arrow indicated thereon, the puwls being so arran ed as to allow but a 'single revolution of t e winding member 30 for each opera tion'of thedevice as previously stated, As to the winding operation, while knob 87 is being rotated thereby also rotating the: rftchet wheel 25 of course, back rotation of the winding member 30 is prevented, due

, to the engaging of the teeth on ratchet wheel 25 bethe check pawl 33. As the winding mem r 30 "nearsv the completion of its-single revolution' the beveled surface of tooth VM on the ratchetiwheel 25 en ages the bev-` elodurfooe of the` tooth ofA c eck .pawl33` und as the movement of setting memberis continued, che'ok pawl 33' is movedoutward, thereby causing its pnv39 to lift the locking tooth of pawl 31 out of the slotof disk 32, of course rotating; the saidI puwl A31 on its pivot,V and moving its arm 31 toward disk Loonse@ This downward nunfement of arm 31 of pawl 3l om es it 'to engage pin 42, movinethe said pin 112 toward the disk 32, thereby moving; oli normal loi'liing puwl into the position indicated by the (lot-ted lines in Fig. ll, directly in the path of tooth 36, and proventino any further advance of' the winding menmer 30. Ae the 'tooth titl of Hatchet wheel enge the oil' normal looting? pai rl eher wl moves into locking eng gement jooth 3ft as in Fig. 1&2, thereby ,neven :my buck rotation of the setting; Luiembe 4As just stated, the pin 32 was moved Lotto engagement with the pewl 3l find the i lent of pin 39 was enough to li'ii't poul "it out of the slot in disk 32, therebyv rcleosin the cylinder 6 to allow ot u single revoluton thereof by thespring motor,

/il signin foi nient with th' the movement will oleo lic noieo setting member 30 actuation during the revolution of cylinder or operation of the impulse meehonism Upon normal locking powl dropping into engagement with the slot in disk 32,l arm 31 moves upward, allowingr off normal locking pnwl 35 to be again restored to normal by the tension spriin;u 43, thus 'unlocking winding member 30. It will be noted that when puwl 33 is forced outward by tooth 34, pin 39 lifts awl 31 out of locking engagement with dis 32 and the arm 31 of pawl 3L at the same time engages pin 42 of pawl 35 moving thepawl 35 into its locking engagement, and when pawl 81 again drops into the slot of disk 32, its arm 31 allows off normal locking pawl 35 to again move out` of locking engagement, thus securing practically imultaneous operation of parwls 31 and 35 and these pawls 3l and 35 so far as the operation just dosoribed might be 'a sin le member but for the following reasons t ey are made separate. A ssumingnnoperutor rotaftefgpetting of cylinder 6 the normal locking pawl 31 is free to again move into locking engagement with the slot of disk 32, but. the pawl 35 is' held in its off normal position due to the tooth 36 being rmly pressed against said pawl by the operator as above stated, thus preventing its restoration to normal until the operator releases his hold upon the knob 87, thereby relieving this pressure- 10 and allowing pawl 35 to restore. It will be seen that if pawls SI and 35 were a single member the cylinder (3 would continue to be rotated by the spring motor until the spring 26 was unwound, as the locking pawl 31 would be held out of operative relation with disk 32 if the operator continues` this said forward ressure upon the winding member 30. ilhile this condition just described is an abnormal one, it is one of the points which is'. a great advantage to guard against. To prevent. an operator from interfering with the adjustment of the setting members 4 while the impulse mechanism is operating, locking mechanism is provided comprising a pivoted locking arm 75 shown in a normal position in vFig. 4e. The said member 75 is securely fastened to a hub 76 which is loosely mounted upon shaft 8. Arm '75 is connected to off normal locking pawl 35 by means of a link 77, the said link being pivoted at one end to pawl and at its other end to looking arm 75. The off normal locking p'awl 85 being held in locking en- -gagement with ratchet wheel 25 during the 35. ltime the' impulse` mechanism is operating, it

Y follows that locking' arm 75 is also held in an ofgnormal position, due'to this connec- 'tion with said pawl 35 by link 77, the said r locking arm' 75 being shown in itsI off nor- 4d? mal lockino )osition in Fie. 5 ad'acent n n a yto the endsof sliding bar 17. Thus it will be ,seenl that while the locking arm 75 is in azn od normal position bar 17 is held loi d in the position illustrated in Fig. :2 and due to-,the' rollers 18 engaging the teeth of star 'wheels 16 it will be seen that all of the setting members -L are locked against actuation 4until pawl 35 is restored to normal and restoring locking arm 75 to a normal position as shown in Fig. 4, again allowing movement of bar 17.

` I have referred to the mechanism employed in Winding the power spring and releasing the impulse cylinder for operation '55 and I will now describe the governor mechanism for retarding the rotation of the cylinder 6, that a predetermined uniform speed thereof may be `maintained. To control the speed of this cylindert I preferably employ 60, a 'well known form 'of governor G which `issnitably geared to the cylinder 6. `'il` he shaft 45 of Vgovernor G is suitably ournaled at one end by means of a pivot screw 4G y which is threaded' into the bracket 47, the said bracket 47 being rigidly fastened to the casing 1. A lock nut 48 is provided for locking the pivot screw 46 when adjusted. The other end of shaft 45 is journaled in the bracket 49, the said bracket 49 also being rigidly fastened to the casing 1. A friction disk 50 is provided and loose upon the shaft 45, the said disk 50 being prefer'- a'oly integral with its hub 51. A collar preferably integral with shaft 45 is provided and a pair of leaf sprin s 53 are also provided for connecting the frlction disk 50 and said shaft one end of the springs being secured to collar 52 by means of .screws 54, the other end of said springs being secured to the disk 50 by means of screws Attached to spring 53 are' the' weighted menibers 56; An adjustable screw 57 is threaded into bracket 47, thc said screw 57 carrying a rubber friction tip 58 adapted to rub against a surface of the disk 50 when the governor G is rotated.- The action of governor G is well known,- the said governor when rotated at a predetermined speed causes the Weighted members 56 to tend to move outward, caused by the centrifugal force, thus moving disk 50 longitudinally upon shaft 45 to rub against the friction tip 58 and retarding the speed of the device in a well known manner. The gearing connecting governor G with cylinder (i comprises apinion 59 cut upon the shaft of governor G, said pinion being in mesh with an idler gear 60. Gear 60 is fastened to shaft 61, the' said shaft also having the teeth of a pinion (S2-cut thereon. Pinion (32 is in mesh with gear 63. the said gear (i3 being securely fastened to its shaft 64, which also carries an integral pinion which is in mesh with the gear 66. lGrear 66 is loose upon its shaft ($7, the said'. shaft (57 having a ratchet wheel GS rigidly secured thereto. Piv'oted to gear (36 isa pawl (35) which is held in engagement with the teeth of ratchet wheel (37 by the action of spring .70. Springf70 is pinned to gear 66, the said spring 70 having two ears extending therefrom and pinned into openings in said gear 66 by means of the pins 7l. A. pinion 72 is cut upon the shaft G7, the said pinion 72 being in mesh with the gear 73, said gear 7f3 being suitably secured to an end of cylinder (i.

Then the winding member 30 is rotate( and the mechanism released for rotation, the gears rotate in the direction indicated by the arrows thereon, and it will be noted that as the mechanism restores to normal after the complete revolution of thc device locking pawl 31 engaging the disk 32 causes the cylinder G to come to an abrupt stop and but for the provision of the ratchet and pawl mechanism upon shaft G7, the governor and gearing would also come to an abrupt stop,

but due to this said ratchet and pawl arrangement, the governor Gr rotates of lts own momentum for a short period and gear G6 .bers l, di', etc.7 are.

is carried along by the governor, its pawl 69 moving over the teeth of ratchet wheel G8 which is nonT at rest, due to the-locking of cylinder t.

F 17 represents diagrammatically a substation telephone with the calling device of my invention, which is also shown diagrammatiealiv, connected thereto. In the said Fig. l., 8O represents an ordinary switch hooi; in its normal position with a receiver 81 hung thereon. A call bell S2 and condenser S3 are connected inv bridge oit the telephone line, being normally closed through the normal contacts of switch hook 80. An impedance coil 841 and transmitter 85 are provided being adapted to be connected in circuit when the receiver is rei'noved, whereby the all bell 232. is disconnected The tclepliione circuit is a Well known arrangement and further explanation thereof is deemed inmecessary. Connected in .shunt of the substation apparatus are the shunt springs -tl and Aall normally opened and adapted when closed to shunt or short c1rcuit the substation apparatus. Impulse springs are connected in circuit with the telephone adapted to have their contact interru, o the imeration ol' cylinder (5 and the intermediate members 5, etc., and 3 as previously described.

Having described in general a preferred arrangement of the calling device of my involition, a dcscri'ition ot' its operation will benoiv entered into. Assuming the calling device is connected in circuit with a substation telephone as illustrated in F ig 17, and

lassuming further that it is desired to connect by means ol central otlice automatic equipment with another subscriber Whose telephone number is 11110, the setting memadjusted to the position indicated 'in Fig. 1. l'Vith this adjustment im pulse arm 5 is adjusted to be operated by impulse tooth a' only, thus operating impulse springs a single time. Impulse arm 5" 's adjusted so that it will be operated by impulse tooth fr. only, thereby operating im pulse springs a .single time. Impulse arms 5 and 5 are also adjusted so that they will be operated only by their corresponding im pulse tooth e? and a3 thereby operating impulse springs 2 but a single time, While ims pulse arm 5* is adjusted to be operated by all oi its corresponding impulse teeth a to j, tlifereby operating impulse springs 2 ten times. Thus it will be seen that when eylinn der ,6 revolved, impulse arni 5 is the first arm' actuated followed byin'ipulse arms 5', 52,/"53, and l54 successively7 and due to the angular' spacing of the a t impulse teeth upon cylinder G as shown ih Fig. it will be noted that there is a period between each set of teeth in whi lr no operation of theA impulse springs is erected, thus' allowrl l l line the said snrinfrs 2 bein .i

ing time for the automatic selection of a trunk as is Well known or theoperation of relays or other purposes. Having adjusted the setting members 4. so that the indicating numbers indicate 11110, the operator then rotates Winding member 30 a complete revolution, causing tooth. 34; on ratchet 'wheel 25 to lift check pawl so that its pinV 39 engages normal locking pawl 31, lifting said pawl 31 out of the slot in dirl-4v the arm 31 thereby acting upon p.' 12 moving ott normal locking paw into its locking position to prevent further forward Inotion of Winding member 30. locking paWl 3l being lifted out of the slot in disk 321 the spring motor free to act lil'pon normal i its rotation and the operator now releasin his hold upon winding member 30 it is held against back rotationj due to check pawl 33 being engaged by tooth 34 as illustrated in Fig. 12. The cylinder (5 havin immedi ately started its rotation upon eing released by pawl 3l, the said pawl rides upon the periphery of disk 32, thereby holding the shunt springs 41, 41 closed, Off normal locking paWl having been moved into 5.,, locking position as indicated by the dotted lines in Fig. 11, locking arm` 75 was thereby moved into itslocking position as indicated in Fig. 5, locking plate 17 and preventing any actuation ot the setting members 4 until the impulse mechanism has operated. The Winding member 30 is now also locked against actuation, the off. normal locking pawl 35. preventing forward pawl 33 pre movementl thereof ,and check' venting backward movement thereof, thus eill'ectively'locking the Winding member 30 against any i'nove'ment during the operation of the impulse mechanism. Cylinder 6 havs ing started its rotation as stated, arm 5 is the first impulse arm eration being effected in this instance by its corresponding impulse tooth a, and operating impulse springs 2 a Single time. Cylinder 6 continues in its rotati'oinbeing retarded by the action of the governor G as .previously described, this rotation continu ing until impulse arm 5 -is operated, this operation in this instance being effected by its corresponding impulse tooth a, thereby again actuating impulse springs 2 a sin le time. Impulse arm 52 is nextA operate a single time by its' corresponding impulse tooth a2 followed by a single operation of impulse arm pulse` tooth a3. to be operated, by .its corresponding teeth a* to j, thereby causing ten operations of impulse springs 2. After the last tooth j* has passed its mplse arm 5, disk 32 is in a position whereby normal locking pawl 31 is moved into Impulsearm 5*, the last arm operated, the said opis in this instance, effected y 'locking engagement with rthe slot therenl MOY due to the action of shunt spring 41 which is pressing upon said pawl 31, thus stopping the movement of the cylinder and also allowing the shunt springs 4l, 41 to 5 open their contact. rl'he restoration of locking pawl 31 to normal of course allows ottn normal locking pawl 35 to be moved to its normal position as indicated in Fig. 1l I due to arm 3l moving upward allowing pawl 1 0 35 to follow, thus releasing the winding member 30, rl`he restoration of pawl 35 also moves locking arm 75 into its normal position indicated in Fig. 4, thereby freeing plate 17 and allowing adjustmentof setting members 4, whereby a different set ot' impulses may be set up if desired.

Should the subscriber desireto repeat the same eall,vthat is, transmit the same set of impulses which were last sent, it is only 20 necessary to again rotate winding member 30 as before, thereby causing another operation of the impulse mechanisn'i of the calling device. Although as previously stated, when the cylinder G makes a complete revolution,

it comes to an abrupt stop when pawl 31 recngages the slot in disk 3Q, but the governor G which had been rotating at a relatively high speed does not come to an abrupt stop, due to the ratchet and pawl arrangement upon shaft 67 and the said governor continues rotating under its own momentum for a short period when it comes to a stop.

vWhile I have illustrated a preferred arrangement of the calling device of my invention, itis to be understood that many changes and modifications thereof may be made, and while I have described and illustrated m'y invention as operating in connection with a substation telephone'and par- 40 ticularly in such a telephone in which the metallic circuit is interrupted, I do not desire to be limited to such an arrangement but aim to. cover all such changes and modifications as come within the spiritl and scope of the appended claims. "I`claim;

l' A calling device comprising ad'ustable impulse mechanism, an independently mani u'ally operable adjusting member for said impulse mechanisnna spring motor deviceJ adapted for operatingsaid mechanism, a manually operated winding member orsaid mtnr device, mechanism operated reslpont. 'slilt'o the winding operation of said Windmg' member for releasing said impulse mechanism for operation by 'said motor device, and rmeans for locking said winding member against actuation during operation 0f said impulse mecha ism. 2, A calling device comprising adjustable impulse 'mechanisnn a spring motor device` adapted for operating said mechanism, a manually operated Winding member lfor said motor device, mechanism operatel responsive to the winding operation of sai winding member for releasing said impulse mechanism for operation by Isaid motor device, and means i'or locking said impulse mechanism against adjustment. during said winding operation. I

3. A calling device comprising a manually operated setting member, impulse mechanism adjusted responsive' to said member,-

ed for operatinn said mechanism, an inde-.

pendently opera ile winding` member, mechanism operated responsive to the winding operation of said spring motor device for releasing said impulse mechanism for operation thereby, and means to prevent Winding of said spring motor device during said operation of the impulse mechanism.

5. A calling` device comprising a manually operated setting member, impulse mechanism adjusted responsive' to said member, a manually wound sprinfr motor device adapted for operating saids mechanism, an independently operable winding member, mechanism operated responsive to the Winding operatien of said spring motor device -ir releasing said impulse mechanism for operation thereby, and mechanisms to prevent actuation of said setting member or winding of said spring motor device during said operation of the. impulse mechanism.

G. A calling device comprising a manually operatedA setting member, yimpulse mechanism .adjusted responsive to said member, a spring motor device adaptedfor operating said impulse mechanism, a manually operated Winding member for Winding said motor device, means operated responsive to the winding operation of .said winding member for releasing said impulse mechanism for operation by said "spring motor device and means to' prevent actuation of said setting and Winding members during, said operation of the ,impulse mechanism.

7 Ina calling device the combination with a plurality of settin members,of impulse mechanism adjusta le by said members, motor mechanism for operating said impulse mechanism, and means for preventing a setting operation of said setting members during operation of the impulse mechamsm.

8. ln a calling device the combination with a plurality oi' scttin)r members, of impulse mechanism adjustable by said members, spring. motor meclninism :for operating 'said impulse mechanism., a -ivinding member adapted. to be operated for Winding said motor mechanisltu, and means for preventing operation ojt said' setting and Winding .menibers during operation of said impulse mechanism.

9. ln a calling device the combination with aplurality of setting members, of imsaid setting mem ers are locked by said devices.

10. A calling device comprising a rotatable member, im )also teeth. of varying lengths, carried y said `member, motor mechan' for rotating said member, an impulse arm adapted to be reciprocated by said tt. 'i when said member is rotated, and

meL ier adjusting said arm with relation to sat1 teeth whereby said arm 1s reciprocatcd by a number of said teeth depending upon .its relative adjustment.

1i.. A calling device comprising a cylinder, impulsetceth of varying lengths, upon the peripheryot' said cylinder, motor mechanism for rotating said cylinder, an imp ulse arm adaptedto be reciprocated by said teeth when said cylinder is rotated, and .means for longitudinally adjusting said arm with relation to said teeth whereby said arm is reciprocated by a number oit said teeth deaiding upon its relative longitudinal ad yj ustment.

12. A calling device comprising a cylinder, sets 0f impulse teeth carried upon the periphery of said cylinder, each .set compris lng teeth of varyii'ig lengths, motor mechanism for rotating said cylinder, an impulse arm for cach set. of teeth adapted to be reciproeated thereby when said cylinder is rotated, and means for longitudinally adjusting each arm with relation to its corre`- spending set of teeth whereby an arm .is re-v ciprocated by a number el. its fairresponding teeth depending upon its relative longitinliH nal adjustment, said sets of teeth. being so disposed upon said. cylinder with relation to their correspondingarms, that no two oi said arms are reciprocated at the same time during rotation of the cylinder.

13. A calling device comprising a cylinder,.sets of impulse teeth carried upon the periphery of said cylinder, each set compris.

ing teeth of varying lengths ,motor mechanisrn for rotating said cylinder, animpulse arm for each set of teeth adapted to be reciproeated thereby when said cylinder is rotated, means fory longitudinally adjusting each arm with relation to its, ci)rrcsponding set ot teeth whereby an. arm is rcciprocatral by a number oit' its corrcspoinling teeth dcpending upon ils relative longitudinal adjustment` said sets of teeth being so disposed upon said cylinder with relation to their cor responding arms, that no tivo of said arms are reciprocated at the same time during rotation ot' the cylinder, and a set of coperative impulse contacts common to said impulse arms adapted to be operated corrc spending to tbe reciprocation ci said arms.

114-. A calling device comprising impulse mechanism, a .manually operated 'setting member for adjusting said mechanism for transmitting dillerent numbers of impulses, a spring motor device adapted for operating said mechanism, means for normally locking said mechanism, a second iiulcpendently manually operated member for winding said motor device, and means actuated upon final Winding movement of said winding mem ber to unlock said mechanism for operation by said motor device.

l5. A calling device comprising a plu rality of independently operable setting members, impulse niccluinism adjustable.' by said members, motor mechanism for operating said impulse mechanism, and means for preventing any effective actuation of said setting members during the opration of the impulse mechanism when transmitting impulses.

16. A calling device comprising relatively stationary sets of impulse teeth, an impulse arm and associated adjusting means for each set of teeth, impulse contacts adapted to be operated by said arms, and means for moving said teeth'to operate said arms and irnpulse contacts.

17. A calling device comprising cylindrically disposed relatively stationary sets' of impulse teeth, an impulse arm and associated adjusting means foreach set of teeth, impulse contacts adapted to be'operated b said arms, and means for rotating said teet to operate said arms and impulse contacts according to the adjustment of said arms.

1S. A calling device con'lprising cylindrically disposed relatively stationary sets of 'fipulse teeth, an impul' arm and asso-l ciated adjusting mouille for each set of teeth, a common set off. impulse contacts adapted to be operated said arms, a spring motor adapted torotate said teeth to operate said arms and impulse contacts accor'iiing `to the adjustment thereof, and manually operated winding means for `said motor. ,i

' 19. A calling device comprising cylindrically disposed relativelyY stationary sets of impulse teeth, anlimpulse arm and associated adjusting member for each set of pulse contacts ladapted to be operated by said arms, a sp1-ing 'motor ndpted to rotate said teeth to operate said arms and impulse contacts according to the adjustment thereof, manually-operated winding means for said motor, and Ineens to cau-se an operation of said impulse teeth bysaid motor rendered effective by the Winding operation thereof.

1 20. A calling device comprising cylindrially disposed relativel stationary sets of llmpulse tee'th, 4en impu se arm for each set of teeth, means for adjusting said arm for `und Stute various degrees of operation by their associated impulse teeth,.i1npulse contacts adapted to be operated by lsztid arms, and means for driving said impulse teeth to operate said nrnis and contacts according to the adjustment thereof. 1

' Signed by ine at Chicnge, county of Cook of Illinois, in the presence oftwo witnesses.

Witnesses:

GEORGE E. MUELLER,

M. R. RooHFoRD.

WILLIAM KAISLING. 

